Genetic parameters of survival in four generations of Indian white shrimp (Fenneropeneaus indicus)

Abstract

ABSTRACT This study evaluated the genetic variance for survival at harvest of Indian white shrimp (Fenneropenaeus indicus) using a pedigreed synthetic population generated upon collecting broodstock from different fishery grounds in Egypt. The estimated heritabilities (h 2 ± SE) of survival from generations G0 to G3 ranged from 0.144 ± 0.026 to 0.008 ± 0.030 using a model that included the common environmental effect (c 2). Low heritability (0.014 ± 0.015) was estimated across generations with the inclusion of common environmental effect (c 2). However, the h 2 of survival from G0 to G1 ranged from 0.569 ± 0.071 to 0.410 ± 0.011 when c 2 was not included. The genetic correlation for survival between different ponds from G0 to G3 was moderate to high (0.79 ± 0.042 to 0.83 ± 0.012) but significantly different (P < 0.05). There were low correlation coefficients (−0.237 ± 0.089 to 0.316 ± 0.073) between body weight estimated breeding value (EBV) and survival EBV of families in four generations.